<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    * {
      margin: 0;
      padding: 0;
    }
    html {
      /* 在 375 的屏幕上 10vw 等价于 37.5 px */
      font-size: 10vw;
    }
    .box {
      width: calc(100rem / 37.5);
      height: calc(100rem / 37.5);
      background-color: orange;
    }
    span {
      font-size: calc(14rem / 37.5);
    }
  </style>
</head>
<body>
  <div class="box"></div>
  <span>375设计稿中div宽高234.375px 文字font-size=32.8125px</span>
</body>
</html>
